Weft stop-motion for looms



UNITED STATES PATENT (NEIGE,l

ELW'OOD M. COLE, 00F LEWIS'ION, MAINE.

WEFT STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 251,699, dated January 3, 1882.

' Application filed July 28, 1881.. (No model.)

To all whom. 'it may concern Be itA known that I, ELWOODl M. COLE, of Lewiston, of the county of Androscoggin and State of Maine, have invented a new-and useful Improvement in Weft Stop-Motions for Looms; and I do hereby declare the same to be described in the following specification and represented in the accompanying drawings, of which- Figure l is a top view, and Fig. 2 a trailsverse section, of the lay and breast-beam of a loom with my stop motion applied thereto. Fig. 3 is aside view, and Fig. 4 a bottom view, of the catch-lever N, hereinafter mentioned. Fig. 5 is a top view of the bracket L.

The nature of my"`improvement is defined in the claim hereinal'ter made. j

In such drawings, A denotes the race-beam of the lay, and B the breast-beam of a loomframe. i

Extending transversely across, or nearly across,the top of thelay is a channel or groove, a, to receive theprongs b of a fork, C, pivoted within a support-piece, D, that is` fastened to the inner face of the lay, the same being so as to admit of the fork heilig turned up or down in a vertical plane. Fixed on one of the journals c of the said l'ork is a sectoral gear, E, from which an arm, F, in one piece with such gear, projects toward the lay, in manner as shown, and is provided near its free end with a stud, d, such stud being extended into the slot @of aconnecting-rod,G, thatdepends from the said stud. At its lower part the rod is jointed to a tripping-pawl, H, arranged with and pivoted to a bracket, xf/,atlixed to the racebeam, as shown.- Furthermore, the toothed sector or sectoral gear E engages with another such gear,f, which constitutes the upper and shorterarm of alever, l, formed and arranged as shown, and fulcrumed in or to the supportpiece D. Fixed to the said piece D, and to extend over and cover the sectoral gears, is a guard or shield, K, which is to prevent an attendant of4 the loom from accidentally interfering with the gears. The said-guardalso protects such gears from becoming choked by waste or by a broken filling or weft yarn.

Attached to and projectingfrom the breastbeam and toward the lay is a bracket, L, whose horizontal portion is channeled reetilinearly 4to receive a furcated slider, M, between whose prongs, and'fulcrumed thereto, isacatch-lever, N ,formed as represented in side view in Fig. 3 and in under side view in Fig. 4. The bracket L has, besides the groove or channel, slots m n arranged in it, as shown. The slider M ex; tends through the bracket, and is jointed to an arm of a right-angular-lever-shaped spring, O, fulcrumed to the breast-beam, and arranged as shown. The other arm of the lever O rests against a projection, o, from the slide-rodp, usually applied to the shipperof theloom. By moving the said slide-rod by the lever-spring O the shipper of the `loom will be forcedout of its catch-notch, in which case the driving-belt, by the elastic power or spring of the shipper, will be moved from its driving-to its loose pulley, so as to produce stoppage of the loom, as well understood by persons skilled in the making and using ot' looms. l

In Fig. 2 the positions the main parts of th stop-motion assume when the lay is at lthe greatest distance from the breast-beam are represented by dotted lines.

The operation of the said stop-motion may be thus described: While the weaving of a piece of cloth is progressing and the fillingthread carried by the shuttle through the shed of the warps and across the race-beam is unbroken, the prongs of the fork cannot fall into the groove a, as they will rest upon the filling; but should such thread become broken and not extend across the said groove the prongs will fall into the groove. In so falling into the groove thefork, by means of the sectoral gears, will depress the connecting-rod G so as to allow the `pawl H, by its gravitating power,to fall sulciently for it, in the next movement of the lay toward the breast-beam, to be carried against the shoulder q of the catch -lever N, and thereby cause a rearward movement of the slider M, and consequently such a movement of' the lever-sprin g 0 as will insure a stoppage ot' the loom. While the slider M is being so moved the catch-lever N, moving with it, will be drawn outof the rear slot, m, and depressed into the front slot, n, whereby the shoulder g will be moved out of engagement with the pawl. its notch the slide-bar will be so moved bythe shipper as to cause the lever-spring O to crowd While the shipper is being restored tol IOO the slider M backward Within the bracket, and thereby cause the lon ger arm of the catch-lever N to pass into the notch m suciently to raise the shoulder q to its position to be met by the pawl when next properly lowered therefor. The lay, in going back,carriestbelowerinclined end, r, of the lever I against avprojection, s, so as to cause the fork C to be tilted high enough for the shuttle, atits next throw, to pass under and without Contact with the prongs ot' the fork. Immediately on the lay commencing to break up, the leverl will be moved away from the projection s, so as to enable the fork to drop upon the filling extending across the groove a.

The slot e of the connecting-rod G is to allow the pawl, during the buck movement of the lay, to rise and pass over the catch N without at the same time creating any movement of the fork, whose prongs at such end are Within -the groove a.

The prongs b bof the fork C are in one piece, bent at its middle, like a hairpin, the same being as shown in Fig. 6. They go through the shank tot' the fork at right angles thereto, 2 5 and are heldtherein by clamp-piece u, forced against them at their junction by a screw, 'v, going through the said clamp-piece and screwed into the shank. On loosening the screw and turning the clamp-piece down upon it the prongs of the fork, when injured, can be extracted from the shank and others readily substituted.

Fig. 7 is a vert-ical section ofthe fork-shank, the clamp-piece, and its fastening-screw.

Vhat I claim as my invention is The combination substantially as described, such consisting of the lever-spring O and the stop-motion fork C, lever I, arm F, sectoral gears E and f, slotted connection-rod G, pawl H, projection s, slotted and grooved bracket L, slider M, and catch-lever N, all arranged and adapted to operate essentially as set forth.

ELVVOOD M. COLE.

Witnesses:

R. H. vEDDY, E. B. PRATT. 

